The act and/or result of a man taking such a large shit that it ice-creams beyond the water level while simultaneously pushing against the ejaculatory gland in the rectum hard enough to make the man ejaculate(cum like a stallion) on the peak of the newly formed shit mountain, creating a brown and white massive volcano shit

"Babe you aren't gonna believe I the dump just unloaded! I think I'll call it Mount Vesuvius."